Yes, cool idea. This is something I thought about when the APU1 came out, using the additional 3 channels of A/D for the same purpose.

For your suggestion here, though, it would have to be behind another feature that's near the top of my current list, which is to enable the ability to log from multiple [serial, etc] ports at the same time. This would be necessary in order to take input from your board while also logging the vehicle and (e.g.) a wideband controller._________________***************************************
TunerPro Author
1989 Trans Am